Steam-trap.



No. 721,312. PATENTED PEB.;24,1903\ F. D. KOEWHLER& 'T. W. MONAHAN.

STEAM TRAP. APPLICATION FILED JUNE 6. 1902.

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No. 721,312. PATENTBD FEB. 24-, 190s F. D. KOEHLER & T. W. MONAHAN-STEAM TRAP.

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UNITED STATES P TENT OFFICE.

FREDERICK D. KOEHLER AND THOMAS W. MONAHAN, OF NEW YORK, N. Y.

' being shown in section.

STEAM-TRAP.

7' SFECIFICATIQN forming part of Letters Patent No. 721,312, datedFebruary 24, 1903.

Application filedil'une 6, 1902. Serial No. 110,410. (No model.)

T at whom it may concern:

Be it known that W6,FREDERICK D. KOEH- LER and THOMAS -W. MONAHAN,citizens of the United States, residing in the borough of Richmond, NewYork city, county of Richmond, State of New York, have invented certainnew and useful Improvements in Steam- Traps, of which the following is aspecifica tion.

0ur invention relates to steam-traps adapted to return water ofcondensation from the pipes of the system to the boiler or generator. Itmay also be used as a gravity-pump.

The objectof our invention is to provide an inexpensive trap of quickand positive action, requiring little lubrication, with accessiblevalves, and of large capacity for its size.

In the drawings, Figure 1 is a side viewpartly cut away and showing someof the operating parts in section. Fig. 2 is a front view of the valvesand ports, the valve-frames Fig. 3 is a perspective view of the weightedwheel carried on the main shaft. Fig. 4 is a front view, thevalve-casing being shown in section on the line 4 4 of Fig. 1. Fig.5 isa front view of the weighted wheel and counterweight.

Referring to the drawings, 1 is the main chamber of the trap with thecylinder-shaped extension 2 at the top.

3 is the opening for the outlet-pipe, and 4 the opening for theinlet-pipe. The main shaft 5 is journaled at 6 in the side of thechamber 1 and at 7 on a post 8, extending up from the other side of thechamber. 'Faston shaft 5 is the counterweight 9, and opposite theretofast to the shaft 5, midway between bearings 6'and 7; is the forked arm10, on theend of which the bucket 11 is hung; The weighted wheel 12is-loosely carried on the end of shaft 5, which extends beyond bearing7. The wheel 12 has four spokes 13, 14, 15,

and 16, the two adjacent spokes 13 and 14 15 is weighted, as indicatedat 20, Figs. 3a'n'd' 5. Starting half-way between spokes -13 and 14 thewheel is cut away for one huh-f dred and eighty degrees opposite theweight 20, Fig. 3, to form the ledges 21 and 22, adaptleads to theboiler.

with by port 28. are held closed, shutting off boiler-pressure.

ed to contact with the lever-arm 23, Fig. 1, which is fast -to shaft 24.Shaft 24 extends through cap 25, which is bolted to the head of cylinderextension 2. The valve-easing 26 is screwed'over the cap to form theauxil- ,iary chamber 27, from'which the port 28 extends through cap 25to the top of chamber 1, as indicated by dotted lines in Fig. 1.Extending from cap 25 into auxiliary chamber 27 are the valve-frames 29and 30, Figs. '1, 2, and 4. The port-31 extends through cap 25 fromvalve-frame 29 to pipe 32, Fig; 4,1which The-port 33 extends through cap25 from valve-frame to pipe 34, Fig. 4, which opens to the atmosphere.'The shaft 24 carries on its end opposite to lever-arm 23 an enlargement35, through which extends the lever 36, forked at each end to receivethe valve-stems 37 and 38, which have horizontal slots (not shown)engaged by pins 39 to connect the valve-stems to the ends of the forkedlever 36.

'The guides 40 control the path of the valvestems. In valve-frame 29 aretwo seats 41 and 42 for the puppet-valves 43 and 44, the lower valve 43being slightly larger in diameter than the upper valve 44. Invalve-frame 30 there is a single seat 45 for puppet-valve 46.

The operation of the trap is as follows: The inlet and outlet pipes areprovided with the usual check-valves. (Not shown.) vWhen the trap isempty, the bucket 11 remains at the bottom of chamber 1 and wheel 12 isin the position shown in Figs. 1, 3, and 4, the ledge 22 contacting withlever-arm23, lever 36 being in the position indicated in Figs. 2 and 4to raise puppet-valve 46 from its seat 45, thus venting'to theatmosphere auxiliary chamber 27 and chamber 1, connected there-Puppet-valves 43 and 44 As the trap is now vented to the atmosphere, thewater of condensation runs into chamber 1 through the check-valve in-theinlet-pipe 4, (.notshown,) the check-valve in theoutletpipe 3, whichleads to the boiler, being closed by excess of boiler-pressure. As thewater rises-in chamber 1 counterweight 9 overbalances the weight ofbucket 11, which rises, counterweight 9 falling. The pin 19 thencontacts with lug 17 on spoke 13 and slowly revolves wheel 12, raisingweight 20 thereon. When chamber 1 becomes nearly full of water, wheel 12has been revolved until weight 20 has reached the top of its pathdirectly over shaft 5, and a slight addition of waterthrows weight 20over the center, allowing it to drop freely until the ledge 21 strikesagainstlever-arm 23, shoving it quickly to the right, Fig. 4, thusrocking shaft 24, enlargement 35, and lever 36 to close puppet-valve 46,leading to the atmosphere, and open puppet-valves 43 and 44, leading toboiler-pressure. The admission of boiler-pressure to auxiliary chamber27, and thence through port 28 to the top of chamber 1, closes thecheck-valve (not shown) in the inlet-pipe at 4. As both the pipe 32 andoutlet 3 lead to the boiler, the pressure is equalized and the weight ofthe water in chamber 3 opens the check-valve (not shown) in the pipefrom outlet 3, allowing the water in the trap to flow by gravity down tothe boiler through outlet 3. As the water escapes the weight of bucket11 overbalances counterweight 9, so that pin 19 contacts with lug 18 onspoke 14 and slowly revolves wheel 12 in the reverse direction from thatabove described, the ledge 21 leaving lever-arm 23. When chamber 1becomes nearly empty,whee1 12 has been revolved back until weight 20 hasagain reached the top of its path directly over shaft 5, and a slightfurther fall in the level of the water throws weight 20 over the center,allowing it to drop freely until the ledge 22 strikes against lever-arm23, shoving it quickly to the left, Fig. 4, thus rocking back shaft 24,enlargement 35, and lever 36 to reopen puppet-valve 46, leading to theatmosphere, and reclose puppet-valves 43 and 44, leading toboiler-pressure. This leaves the device in the position first described,the trap being empty and vented to the atmosphere ready for thereception of another charge of water of condensation from the systemthrough inlet 4. The operation above described is repeated indefinitelyand automatically.

By making valve 43 but slightly larger than valve 44 the valves arereadily and quickly opened and closed by the blow of weighted wheel 12against lever-arm 23.

The bucket 11 is constantly full of water. Any solid body to overbalancecounterweight 9 with the leverage of arm 10 when the trap empties may beemployed.

The speed of rotation of the weighted wheel under the influence ofgravity depends upon the relation of the weight of the entire wheel tothat of the weighted portion 20. The greater the relative size of theweighted portion the more rapid will be the rotation of the wheel. Byvarying the proportions the speed with which the valves are operated maybe regulated in accordance with the needs of the steam system. The blowagainst lever-arm 23 to operate the valves is delivered with the entireforce of the weighted wheel; but the suddenness of the blow is temperedby the fact that the weighted portion 20 of the wheel must move the restof the wheel, which acts as a drag or brake.

WVhat we claim as new, and desire to secure by Letters Patent, is-- 1.In a steam-trap a main chamber, a bucket and counterweight adapted to berocked by changes in the level of the water in said chamber, avalve-actuating shaft having a leverarm fixed thereto, an intermediaryweighted wheel adapted to be rotated in one direction for about ninetydegrees by contact with the counterweight during the rise of the waterand for about ninety degrees in the same direction by gravity and to berotated in the other direction for about ninety degrees by contact withthe counterweight during the fall of the water and for the remainingninety degrees by gravity, ports adapted to connect the chamber to theatmosphere or to boilerpressure, valves for said ports adapted to beactuated by the rocking of said shaft, and ledges on said intermediaryweighted wheel whereby the shaft is rocked at the end of the rotation bygravity of the intermediary weighted wheel.

2. In a steam-trap, a main chamber having an outlet and. inlet, anauxiliary chamber connected by a port with the top of the main chamber,ports from the auxiliary chamber leading to the atmosphere and toboiler-pressure, valves for said ports adapted to be actuated by therocking of a valve-shaft, a lever-arm on said valve-shaft, devicesdirectly actuated by the rise and fall of the water in the main chamber,an intermediary weighted wheel adapted to be driven for a part of itsrotation by the rise or fall of the water and for the remainder of itsrotation by gravity, ledges on said wheel adapted to contact with thelever-arm of the valve-shaft at the end of the rotation of the wheel ineither direction by gravity whereby the valves are actuated by a suddenblow upon the filling or emptying of the main chamber.

3. In a steam-trap a main chamber, devices directly actuated by the riseand fall of the water therein, an auxiliary chamber having a portconnected to the top of the main chamber, valves in the auxiliarychamber controlling ports to the atmosphere and to boilerpressure, aremovable cap for the auxiliary chamber, a rock-shaft extending from themain chamberinto the auxiliary chamber and adapted to actuate the Valvestherein, a weighted wheel intermediate between the devices directlyactuated by the rise and fall of the water and the rock-shaft adapted toactuate the valves, whereby the rise or fall of the water raises aweight which is released when the main chamber is full or empty to rockthe valve-shaft controlling the valves in the auxiliary chamber.

4. In a steam-trap, a main chamber with an outlet and inlet for water,devices therein adapted to be moved by the rise and fall of the water,an auxiliary chamber containing operating-valves and having a port tothe main chamber, a removable cap for the auxiliary chamber, arock-shaft connected to the stems of the operating-valves, anintermediate weighted wheel adapted to be rotated in either directionfor half its movement by the devicesmoved by the rise and fall of thewater and for the remaining half by gravity and contact-points on saidweighted wheel adapted engage and shift a lever-arm 0n the rockshaft atthe end of the rotation in either direction of the weighted wheel.

5. In a steam-trap, a main chamber, devices therein operated by the riseand fall of the level of the water in' the main chamber, a valvecontrolling a passage from the top of the main chamber toboiler-pressure, a valve controlling a passage from the top of the May,1902.

FREDERICK D. KOEHLER. THOMAS W. MONAHAN. Witnesses:

JOSEPH A. STETSON,

HARRY R. SAMUELLs.

